Flutter環境配置記錄

D:\flutter>flutter doctor
Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.12.13+hotfix.5, on Microsoft Windows [Version 10.0.18362.535], locale zh-CN)
[!] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    X Android license status unknown.
      Try re-installing or updating your Android SDK Manager.
      See https://developer.android.com/studio/#downloads or visit https://flutter.dev/setup/#android-setup for detailed
      instructions.
[√] Android Studio (version 3.5)
[√] IntelliJ IDEA Community Edition (version 2018.3)
[!] VS Code (version 1.30.2)
    X Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[!] Connected device
    ! No devices available

! Doctor found issues in 3 categories.

報錯如上，首先解決第一個錯誤：

Android license status unknown.

執行：flutter doctor --android-licenses

報錯如下：

A newer version of the Android SDK is required.

To update, run: D:\Android\android-sdk_r24.4.1-windows\android-sdk-windows\tools\bin\sdkmanager --update 

 

好嘛，我們根據提示更新：D:\Android\android-sdk_r24.4.1-windows\android-sdk-windows\tools\bin\sdkmanager --update

報錯如下:

Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
        at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
        at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
        at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
        ... 5 more

查了一下，是說JDK版本較高，接下來我們來修改JDK版本；

在官網上下載了jdk1.8  安裝以后修改環境變量：

 C:\Program Files\Java\jdk1.8.0_221 

刪除 %SystemRoot%\system32 由於cmd直接找到%SystemRoot%\system32里面的Java等文件，現在刪除

嗯? 流程還沒有全部走完呢，就已經成功修改jdk了

C:\WINDOWS\system32>java -version
java version "1.8.0_221"
Java(TM) SE Runtime Environment (build 1.8.0_221-b11)
Java HotSpot(TM) 64-Bit Server VM (build 25.221-b11, mixed mode)

　　那我們試試flutter成功沒有  /雙手合十

D:\flutter>D:\Android\android-sdk_r24.4.1-windows\android-sdk-windows\tools\bin\sdkmanager --update
Exception in thread "main" java.lang.NoClassDefFoundError: javax/xml/bind/annotation/XmlSchema
        at com.android.repository.api.SchemaModule$SchemaModuleVersion.<init>(SchemaModule.java:156)
        at com.android.repository.api.SchemaModule.<init>(SchemaModule.java:75)
        at com.android.sdklib.repository.AndroidSdkHandler.<clinit>(AndroidSdkHandler.java:81)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:73)
        at com.android.sdklib.tool.sdkmanager.SdkManagerCli.main(SdkManagerCli.java:48)
Caused by: java.lang.ClassNotFoundException: javax.xml.bind.annotation.XmlSchema
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:190)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:499)
        ... 5 more

哈哈 沒有用 繼續繼續

突然靈機一動 沒准是我的jdk修改過來，flutter沒有反應呢，在我關掉命令行后重新輸入 flutter doctor

看看看看出現什么了，是不一樣的，我沒見過的錯：

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.12.13+hotfix.5, on Microsoft Windows [Version 10.0.18362.535], locale zh-CN)

[!] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    ! Some Android licenses not accepted.  To resolve this, run: flutter doctor --android-licenses
[√] Android Studio (version 3.5)
[√] IntelliJ IDEA Community Edition (version 2018.3)
[!] VS Code (version 1.30.2)
    X Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[!] Connected device
    ! No devices available

  Some Android licenses not accepted. 
我輸入：

flutter doctor --android-licenses

接着就出現了一堆 是否接受？一路y就好啦

Doctor summary (to see all details, run flutter doctor -v):
[√] Flutter (Channel stable, v1.12.13+hotfix.5, on Microsoft Windows [Version 10.0.18362.535], locale zh-CN)

[√] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
[√] Android Studio (version 3.5)
[√] IntelliJ IDEA Community Edition (version 2018.3)
[!] VS Code (version 1.30.2)
    X Flutter extension not installed; install from
      https://marketplace.visualstudio.com/items?itemName=Dart-Code.flutter
[!] Connected device
    ! No devices available

! Doctor found issues in 2 categories.

后面都是兩個小問題 

祝大家也可以配置成功！